Distortion of Three-Dimensional Vorticity Waves by a Cascade of Airfoils PUBLIC ACCESS

[+] Author Affiliations
J. Fang, P. R. McHugh, H. M. Atassi

University of Notre Dame, Notre Dame, IN

Paper No. 89-GT-246, pp. V001T01A095; 11 pages
  • ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Toronto, Ontario, Canada, June 4–8, 1989
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7913-9
  • Copyright © 1989 by ASME


The evolution of three-dimensional vorticity waves impinging on a cascade of loaded blades in subsonic flow is studied. Analytical expressions are derived for the streamwise, normal and spanwise components of the vorticity and the associated rotational velocity. These unsteady flow quantities are calculated, and their variations analyzed and plotted for a typical loaded cascade. The results show that at large distances from the blades a slow but long range distortion of the incoming vorticity waves takes place. Near the blade surface, the stretching and turning of the vorticity produce large values for the streamwise vorticity component.

Copyright © 1989 by ASME
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